Mine went to every 2 weeks from 20 weeks on with my 2nd, 3rd, and 4th, but they were all moderately high risk. I honestly don't remember when I went more often with my oldest, other than from 36-42 weeks going once a week?

I also visited every two weeks till 36 months .But with my younger one I myself was more confident so sometimes I missed the visit.Once you take care of your baby you have problem in first one and not in the second one.